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Synergistic Polarization Engineering on Bulk and Surface for Boosting CO 2 Photoreduction
Author(s) -
Liu Lizhen,
Huang Hongwei,
Chen Zhensheng,
Yu Hongjian,
Wang Keyang,
Huang Jindi,
Yu Han,
Zhang Yihe
Publication year - 2021
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.202106310
Subject(s) - polarization (electrochemistry) , poling , ferroelectricity , materials science , adsorption , electric field , surface charge , chemical physics , optoelectronics , chemical engineering , dielectric , chemistry , physics , quantum mechanics , engineering
Sluggish charge kinetics and low CO 2 affinity seriously inhibit CO 2 photoreduction. Herein, the synchronous promotion of charge separation and CO 2 affinity of Bi 4 Ti 3 O 12 is realized by coupling corona poling and surface I‐grafting. Corona poling enhances ferroelectric polarization of Bi 4 Ti 3 O 12 by aligning the domains direction, which profoundly promotes charge transfer along opposite directions across bulk. Surface I‐grafting forms a surface local electric field for further separating charge carriers and provides abundant active sites to enhance CO 2 adsorption. The two modifications cooperatively further increase the ferroelectric polarization of Bi 4 Ti 3 O 12 , which maximize the separation efficiency of photogenerated charges, resulting in an enhanced CO production rate of 15.1 μmol g −1 h −1 (nearly 9 times) with no sacrificial agents or cocatalysts. This work discloses that ferroelectric polarization and surface ion grafting can promote CO 2 photoreduction in a synergistic way.